ORDINARY PORTLAND CEMENT 42.5R
(GB175-2007)
SPECIFICATIONS | STANDARD (GB175-2007 ) | CONTROL STANDARD | TYPICAL DATA
|
PHYSICAL TESTS | |||
FINENESS | |||
Specific Surface Area (m2/kg) | ≥300 | ≥350 | 370 |
SETTING TIME | |||
Initial Setting (Minutes) | ≥45 | ≥120 | 210 |
Final Setting (Minutes) | ≤600 | ≤360 | 280 |
SOUNDNESS | |||
Boil test | passed | passed | |
COMPRESSIVE STRENGTH (MPa) | |||
3 days | ≥22.0 | ≥24.0 | 25.8 |
28 days | ≥42.5 | ≥47.0 | 48.8 |
BENDING STRENGTH (MPa) | |||
3 days | ≥4.0 | ≥4.3 | 5.4 |
28 days | ≥6.5 | ≥7.0 | 8.5 |
CHEMICAL ANALYSIS | |||
COMPONENTS, % | |||
Magnesium Oxide (MgO) | ≤5.0 | ≤5.0 | 4.6 |
Sulphur Trioxide (SO3) | ≤3.5 | ≤3.0 | 2.3 |
Loss On Ignition (L.O.I) | ≤5.0 | ≤2.5 | 1.3 |
Chlorine (CL) Content | ≤0.06 | ≤0.05 | 0.02 |
